Hello, here are the instructions from the product manual on adjusting the temperate for this refrigerated dispenser:
"If the unit is not holding food products below 40 deg.F, it is necessary to adjust the unit. This is done by: first, shut unit off and disconnect power, and second, remove the six screws holding the back panel in place. Remove back panel to expose the thermostat which is above the power cord. Adjust the thermostat in small increments and let the unit and food product stabilize; continue this procedure until the unit is holding your condiments at the desired temperature. Reassemble your unit."
For a diagram of these process, the manual can be found under the Literature tab on the product page. Thank you!